如何为字符串添加“ 0”填充,以使字符串长度始终为4?
例
If input "1", 3 padding is added = 0001 If input "25", 2 padding is added = 0025 If input "301", 1 padding is added = 0301 If input "4501", 0 padding is added = 4501
您可以使用PadLeft
var newString = Your_String.PadLeft(4, '0');